Check your tracker clock setup is set UTC-0 o GMT. (The most trackers come from the factory on UTC.)
For most devices you should use IMEI (International Mobile Equipment Identity) number as unique identifier. However, some devices have vendor specific unique identifier, for example TK-103 devices use 11-digit identifier.
Set Up the Factory IL GPS's IP and port on your tracker: (Factory IL GPS detects tracker's protocol.)
Add a Factory IL GPS Account on devices with the IMEI or unique ID.
This information only is for informational purposes only, Factory IL GPS does not have relationship with the device's manufacturer, for more information check the manufacturer's website or user manual.